Auto Level

Auto level is an optical instrument which is used in along with a levelling staff to establish the relative heights levels of objects or marks. It is widely used in surveying  and construction to measure height differences and heights of known objects or marks. It is also useful in construction of roads, to calculate CUT & FILL in a road project, deciding slope on side for draining purpose. It was invented by an English Civil engineer, William Gravatt in 1832. Continue reading “Auto Level”

Odometer

An odometer is an instrument used to calculate the distance from one position to another while carrying out the survey of an area. It was created in 1755 by Ben Franklin, who was a writer as well as a postman, to analyse the best routes for delivering his mail. Continue reading “Odometer”

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